This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A080434 #3 May 11 2007 03:00:00 %S A080434 1,2,3,4,5,6,7,8,9,0,11,48,494,252,510,272,272,216,171,0,168,22,161, %T A080434 696 %N A080434 Duplicate of A062567. %K A080434 dead %O A080434 1,2